Pneumatic tire.



D. MGARTHUR.

` PNEUMATIG TIRE. APPLIGATIQN FILED APR. 1s, 1908.

924,81 2. Patented June 15, 1909.

2 SHEETS-SHBET l.

@X3i tu eases rwanroz D. MGARTHUR.

PNBUMATIG TIRE.

APPLIGATION FILED APR. 15, 1908.

@WLB 1 2. Patented June 15, 1909.

2 SHEETS-SHEET 2.

:g lll/14 Ilm/111 lill/II,l

DANIEL MCARTHUR, OF JERSEY CITY, NEW JERSEY.

, PNEUHATIC TIRE.

Specication of Letters'. Patent.

Patented June i5, 1909.

` application sied April 15, isos. serial No. 427,202.

To all whom it may concern:

Be itlknown that I, DANIEL MGARTHUR, a citizen of the United States,residing at Jersey City, in the county of Hudsoiiand State of NewJersey, have invented certain new and useful Improvements in PneumaticTires; and l do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use' the same.

My invention relates to the construction of pneumatic vtires forautomobiles, motorcycles, and the like, and especially 4to that class ofpneumatic tires wherein are combined a series of independent pockets,chambers, or sections, to"l produce what may be termed a non-collapsibletire, inasmuch as a puncture will bleed but a single pocket-or chamber,thus but slightly reducing the resiliency and effectiveness of the tire.

Heretofore, so far as I am aware, in automobile and like pneumatic tirescomposed of a series of independent "pockets or chambers the vvalvesemployed between the inde` pendent pockets and the Vinflation conduit.

have been such as to permit the bleeding of tliel inflation conduit onthe puncturing of any .one of said independent' pockets or chambers; orelse lit has been of the.plug valve typ'e which required thevindependent manipulation of each valve atthe time of the inflation ofthe pocketsin order to isolate the individual pocket. A

The object of the present invention yis to obtain a construction whereinthe individual pockets or chambers of the tire will beso isolated thata-puncttire of one will in nowise affect the pressure in any of theremaining chambers or in the inflation conduit, and also such a`construction 'that the series of valves controlling the induction portsof theseveral independentpo'ckets may be simul-V taneously operatedeither to isolate the several pockets or to establish communicationbetween t-he several ockets and the inflation and deflation conduit, asconditions may require: l I

A further object of my invention is to obtain such a construction of theindependent pocket, or section. that when the sameis punctured a maximumof rigidity will exist in the punctured pocket to maintain theefficiency of the-tire notwithstanding` the d'efla-tion of one or moreof said pockets o chambers.

To effect these several objects I combine with a pneumatic tire havingan air pocket, and an inflation conduit, an air-conduit, and a valveinterposed between the air-pocket and the inflation conduit said valve'adapted to be opened and closed by the variation of pressure in saidair-conduit, and such a construction embodies the main feature of myinvention. I also form the independent air pockets with telescoping endsthe walls of said ends being obliquely dis osed with relation to thecircumference ol) the tire when said pockets or sections areV associatedto constitute atiie, and such a construction einbodies' a furtherfeature of my invention.

There are other, minor features of invention, involving special featuresof construe' tion, andparticular combinations, ancillary to the maincombinations of my invention, all as will hereinafter more fully appear.

In the drawings chosen for the purpose of illustrating my invention, thescope of which is'pointed out in the claims, Figure 1 is an elevation,partly in section, of a portion of a pneumatic tire embodying myinvention. Fig. 2 is an enlarged transverse sectionof the tire, on theLine 2-2 Fig. 1 showing the valve normally open. Fig. 8 is a horizontalsection of the independent pockets, on the -line 3 3 Fig. 2. Fig. 4 is atransverse section of the tire', similar to F ig. 2, except that thevalve is normally closed. Fig. 5 is a transverse section of the tire,similar to Figs. 2 and 4, except that the valve is located in the pocketinstead of in the inflation conduit. Fig. 6 is a transverse section of atire in which the inflation conduit and the air conduit are shown asindependent tubes, instead of joined as in the other figures of thedrawings. Fig. 7 is a horizontal section of Fig. 3. Fig. 8 isatransverse section of a tire on the line 8 8 Fig. 7. Figs. 9 and l0 arehorizontal sections of other modifications of the cell pocketconstituting the tire.

Like symbols refer to like parts wherever they occur.

I will now proceed to describe my invention more fully so that othersskilled in the art. to which it appertains mayvapply the 'up of a seriesof independent `telescopintr.

pockets a, a, and two inner sections or an- .nular conduits,

one of which, B, is the nia- Vamodification of the cell pocket shown inwhereb tion conduit, and also serves for deflation 1 when required, andthe other of which, C, is a simple air conduit the varying pressuretherein be1ng used to shift the valves D .which control the inlet portsof the independent pockets a, a.

The independent pockets a, a, a series of which constitute the outersection A or circumference of the tire, are provided with telescoping orinterlocking end walls a', a2 on vlines oblique to the circumference ofthe tire,""and as additional means of stiffening' the pocket whendeflated, it is provided with one or more partitions or inner Walls a3integral with the outer walls of the pocket and either in the' plane ofthe tread of the tire or parallel thereto, said Walls'being perforatedas at a* so that the interior of the pocket z is divided up into aseries of communicating cells. The inflation-conduit B and theair-conduit C may be separate annular tubes as indicated in Fig. (i ofthe drawing, but pret'- verably are formed as a single construction withan integral partition b which separates the same into two annularconduits, the inflation-conduit B being the larger of the two when thevalves are located therein.

D, D indicate t-he valves, one of which is employed with eachindependent pocket a of the section A forming the tread, and said valvemay be located either in the pocket a, or in the inflation conduit B asmay be preferred. y

The valve D may be of any desired type which can be shifted by pneumaticressure7 as for instance either piston or side and with eithercross-over or through ports, but preferably is one of the two forms ofpiston valves shown inthe drawings.

The valves as illustrated, consist of a cylinderor casing 1, which, iflocated in the inflation-conduit B, is secu-red to the partition I b bya flange and a nut 2, or in other suitable manner and is provided with aport 3 whoreby the casing l communicates with Vthe airconduit C. Fromthecasing 1 aport or passage 4** leads to the interior of the independentpocket (i which it is designed to inflate through said valve, and saidpassage may be constituted of a threaded tube 2a provided with nuts orclamp flanges 2", 2c connection is made with the walls of theinflation-conduit B and thewalls of the pocket c.

y Opposite to the port or passage 4: the casing or cylinder 1 1sprovided .with a port 4 leadin the cy inder or casing 1 is a springpressed piston valve 5 provided with a through port or passage 5', andthe location of this passage or port 5 of the piston valve 5 willdetermine whether the Valve D shall stand normally open for inflationand be closed by the pneumatic pressure in air-conduit C, as

into inflation conduit B. 4Withinl illustrated in Fig. 2 of the drawing,or whether it shall stand normally closed and be opened for inflation bypneumatic pressure in airconduit C.

When it is preferred to locate the valve D in the individual pocket a,as indicated in Fig. 5 of the drawing, the casing 1 is connected withthe walls of the chamber a and the walls of conduits B and C, in likemanner as before noted, viz., by threaded tubes 6 which constitute thevalve ports leading from the inflation-conduit B and the airconduit C tothe casing, and by clamp flanges or nuts 626".

In Fig. 5 of thedrawings the arrange ment of the valve ports is shownfor the valve normally open, and the piston is provided with a limitstop 7, so that the valve will be closed by pneumatic pressure in airconduit C, but, as hereinbefore noted, if preferred, the arrangement ofvalve ports may be such that the valve will be normally closed, and willbe opened by the pneumatic pressure in air conduit C. i

The inflation-conduitB and the air-conduit C are each provided with itschar valve 8 and 9 projecting through the ellliy of the wheel forcharging said conduits from a suitable air compressor.

Though, in the drawings chosen for the purpose of illustrating myinvention I have shown only a portion of the inner tube of a tire, andhave omitted entirely the outer tire section, yet it will be fullyunderstood by those skilled in the art that the circle constituting theinner tube of the tire is to be completed or built up of separateremovable compartments or pockets a whose ends telescope, and that wheninflated said compartments are inclosed by and rest upon the tread ofthe outer tire section as is the case. with other multiple pocket tires.

The construction being such as hereinbefore pointed out the severalseparate or independent pockets a a constituting the outer section A ofthe tire may b e simultaneously inflated and closed ofi' from each otherand from the inflation-conduit B as follows: If

the valves D, D be normally open, as indicated in Fig. 2 of the drawing,the inflationconduit B will be connected with an air compressor throughcharging valve 8, and the desired pressure (say sixty pounds) induced inconduitB will pass directly and simultaneously in to allof theindependent pockets a, a, &c., through the respective open i valves D,whereupon the air compressor will be disconnected from charging valve 8of .the inflation-conduit B, and said valve closed, and thereafterapplied to charging valve 9 of air-conduit C until the neumatic pressurein air-conduit C is su cient to simultaneously shift all the valves Dand out off the air pockets a, a from each other and from the inflationconduit B, after establish communication pounds,

' eaasie which.` it desired, the pressure in conduit C may be raised toequal or exceed that in the pockets a, a and the inflation conduit B.

-In order to deflate the tire, where the arrangement of the valve ports5a is such as shown in Fig. 2, it will be first necessary to bleed theair-conduit C.V i If, however, the valves DA, D are normally closed, asshown in Fig. 4 of the drawings, the air compressor is first applied tothe charging-valve 9 of theair-conduit C, and the pneumatic pressure inair-conduit G raised' to the desired pressure, say sixty-tive pounds,whiclrwill simultaneously shitt'the pistonsof all of the valves D, D so`as to open communication between the inflation-conduit B and the severalpockets a, a, a, whereupon the air compressor will be disconnected fromcharging valve 9, which will be closed, and applied to charging valve 8,and the inflation-conduit B and the several pockets a, a, &c., will becharged to say sixty pounds pressure. after which the air compressorwill be detached from valve 8, said valve closed, and valve 9 opened tobleed air-conduit C, say tive whereupon the pistons 5 of the severalvalves D, D will be again simultaneously shifted to close the ports, cutotf communication between iniiation-conduit Band the several pockets a,a, a, &c., so that said pockets a, a, a will be isolated from each otherand from the iniation conduit B.

n order to deflate where the arrangement of valve ports is such as shownin Fig. Liit will be necessary to first raise the pneumatic pressure inair-conduit C, which will simultaneously shift all of valves D, D andrebetween the several pocket's a, a and the inflation-conduit B whichnow acts as a deflation-conduit when the valve 8 is opened.

Having thus described my invention, what l claim and desire to secure byLetters Patent is:

l. In a pneumaticftire, the combination ot a plurality of independentair chambers or pockets, an inflation-conduit common to all andcommunicating with each of said pockets, an independent valve for eachof said pockets, and a second air-conduit which communicates with the`independent valvesv so that variation of air pressure in the last namedconduit will sinmltaneously shift the lseveral valves.

2. ln a pneumatic tire, a plurality ot independent air-chambers orpockets, an independent movable valve for each of said pockets, saidvalves'located in the iniationconduit, an inflation-conduit common toall ot said pockets and which communicates a plurality pockets, anindependent spring-pressed mov-- with each of said pockets through itsrespective valve, and a s econd-air-conduit so p connected with therespective Ivalves that the valves may be simultaneously shifted byvarying the air pressure in the last named air-conduit.

3. ln a pneumatic tire, the combination of of independent air-chambersor able valve for each of said pockets, said valve provided with a port,an iniat-ion-conduit common to all and which communicates with each ofsaid pockets through its respective valve, anda second air-conduit soconnected with the respective valves that the valves may besimultaneously shifted by varying the air pressure in said last namedconduit.

4. ln a pneumatic tirethe combination of a plurality of independentair-chambers or pockets, an independent spring-pressed piston valve foreachof said pockets, said valve provided with a through port and havinga suitable casing, an inflation-conduit common to all and whichcommunicates with each of said pockets through its respective valve, anda second air-conduit so connected with the casings of the respectivevalves that' the valves may be simultaneously shifted by varying` thepressure in said last named airconduit.

5. The combination in a pneumatic tire, of a series of air-chambers orpockets, an inflation conduit common to all of said airvchambers orpockets, an air-conduit, and a' series of spring-pressed valvesinterposed between the respective air chambers or pockets and theinflation-conduit and adapted to be simultaneously'shifted by variationof pressure in the air-conduit.

6. ln a pneumatic tire, the combination of a plurality of independentand separable telescoping air-pockets having end walls arranged in aplane oblique to the tread of the tire.

7. In a pneumatic tire, thev combination of a plurality of independentvand separable teleseoping air-pockets having perforated partitions inthe plane of the tire.

8. ln a pneumatic tire, the combination of a plurality of independentand separable telescoping air-pockets having perforated partitions intheplane of the tire and' end walls obliquely disposed with relation to theplane of the tire. v

In testimony whereof I adir my signature, in presence ot two subscribingwitnesses.

- DNEL MCRTHUR. lVitnesses z C. H'. CLARK,

l'osnrir CAMPBELL.

